COMMUNICATION PROCESSING METHOD IN PARALLEL COMPUTER

PURPOSE: To transmit data without performing a synchronizing processing between PUs (processor units) by providing a computer with a communication state control table controlling whether the communication of data is possible or not. CONSTITUTION: This computer is the parallel computer connecting plural PUs 102 by a network 101 and is composed of a data transmission control part 103 controlling the transmission request of the data for other PU and a data reception control part 104 controlling the reception request of the data for other PU. The data transmission control part 103 is composed of a communication state control table 108 controlling the presence or absence of the transmission authority of the data for other PU and the storage location of transmission data on a transmission destination PU, a transmission authority confirmation processing part 107 referring to the communication state control table 108 and deciding the propriety of communication and a data transmission processing part 106 transmitting transmission data in accordance with the information of the communication state control table 108. By updating the communication state control table 108, the matter that data is possible to be received is notified.